Properties located in such an area are privately owned land that just happens to be in the park.  This is called “in-holding”.  An inholding is privately owned land inside the boundary of a national park, national forest, state park, or similar publicly owned, protected area. In-holdings result from private ownership of lands predating the designation of the park or forest area, or the expansion of the park area to encompass the privately owned property. In the United States, the main causes of inholdings is that all of the Federal land-management agencies were formed over a century after the government sold and issued land grants to private citizens to fund the administration of the United States. When the park system was formed, many of these now-called “in-holdings” had been in private ownership for generations and not available for sale when the park was formed. Owners of inholdings are allowed to use their properties in a manner similar to other private property owners in their state. However, they may be subject to additional federal and agency-specific regulations regarding access to their homes and use of their lands by their Federal agency neighbors.  In many cases, particularly if the property has public road access, this is not an issue.